public async Task <string?> ShowFolderDialogAsync(OpenFolderDialog dialog, Window parent)
{
var filePicker = parent.StorageProvider;
if (!filePicker.CanPickFolder)
{
return(null);
}
var options = dialog.ToFolderPickerOpenOptions();
var folders = await filePicker.OpenFolderPickerAsync(options);
return(folders
.Select(f => f.TryGetUri(out var uri) ? uri.LocalPath : null)
.FirstOrDefault(u => u is not null));
}